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Like any elevated tumor marker, elevated AFP by itself is not diagnostic, only suggestive. Tumor markers are used primarily to monitor the result of a treatment (e.g. chemotherapy). If levels of AFP go down after treatment, the tumor is not growing. In the case of babies, after treatment AFP should go down faster than it would normally. A ...
Very high AFP levels may be subject to hooking (see Tumor marker), which results in the level being reported significantly lower than the actual concentration. [29] This is important for analysis of a series of AFP tumor marker tests, e.g. in the context of post-treatment early surveillance of cancer survivors, where the rate of decrease of AFP ...
No screening test is wholly specific, and a high level of tumor marker can still be found in benign tumors. The only tumor marker currently used in screening is PSA (prostate-specific antigen). Diagnostics; Tumor markers alone can't be used for diagnostic purposes, due to lack of sensitivity and specificity. [5]
In pregnant people AFP levels rise at 14 weeks until 32 weeks, and range between 10 and 150 ng/mL in the middle of gestation. This is why AFP can be used alongside other tests as a tumor marker protein in adults. [12] AFP is a single polypeptide chain with a half-life of 4–5 days.
In the United States, the American Association for the Study of Liver Diseases(AASLD) recommends ultrasound screenings every six months for people with cirrhosis, with or without measurement of blood levels of the tumor marker alpha-fetoprotein (AFP). [38] [6] Elevated levels of AFP are associated with active HCC disease, though their ...
One example of an oncofetal antigen is alpha-fetoprotein, which is produced by hepatocellular carcinoma and some germ cell tumors. Another example is carcinoembryonic antigen , which is elevated in people with colon cancer and other tumors.
High levels of alpha-fetoprotein (AFP) in the blood can be found in many cases of HCC and intrahepatic cholangiocarcinoma. Cholangiocarcinoma can be detected with these commonly used tumor markers: carbohydrate antigen 19-9 (CA 19–9), carcinoembryonic antigen (CEA) and cancer antigen 125 . These tumour markers are found in primary liver ...
The AFP-L3% assay, a liquid-phase binding assay, will help to identify at-risk subjects earlier, allowing for more intense evaluation for evidence of HCC according to existing practice guidelines in oncology. AFP-L3% is the standard for quantifying the L3 isoform of AFP in serum of high risk chronic liver disease (CLD) patients.